A skilled worker is any worker who has special skill, training, knowledge, and (usually acquired) ability in their work. A skilled worker may have attended a college, university or technical school. Or, a skilled worker may have learned their skills on the job. Examples of skilled labor include software development, paramedics, police officers, physicians, crane operators, painters, plumbers, craftsmen, and accountants. These workers can be either blue-collar or white-collar workers, with varied levels of training or education.